A significant security breach has impacted Alex Protocol, a leading Bitcoin-based DeFi platform on the Stacks blockchain. The exploit resulted in the loss of over $8.3 million worth of digital assets, marking one of the largest attacks in the history of the Stacks ecosystem. According to the protocol’s official statement, the vulnerability exploited by the attacker was linked to the self-listing verification logic in its implementation. 8.4 million STX tokens, 21.85 sBTC, 149,850 USDC and USDT combined, and 2.8 WBTC were drained from multiple liquidity pools. The Alex Lab Foundation, the organization supporting the platform, has pledged to fully compensate affected users using its treasury reserves, calculated based on an average exchange rate between 10:00 AM and 2:00 PM UTC of the day of the attack, and will be distributed in USDC. This incident follows a similar exploit by Alex Protocol in May 2024 that resulted in the loss of $4.3 million worth of assets, highlighting persistent security vulnerabilities within the DeFi sector.